Harigae took care of Chelsey Collins, 2 and 1. Collins advanced to the match- play portion of this event with a birdie on the first playoff hole to take the 64th seed from Ryann O'Toole and Megan McChrystal at Walking Stick Golf Course.
The 16-year-old Harigae moves on to face Mari Chun, who handily defeated Tamasin Clelland, 6 and& 5.
'I wasn't putting like I did in stroke play,' admitted Harigae, who is competing in her 10th USGA championship. 'Until 15. I said I have to do this now. I've seen the medalist go down many, many times. My experience helped a lot, especially on the last four holes. That's when you start grinding and putting the pressure on the other player.'
Meanwhile, Jun bested Kristen Schelling 4 & 3 in their first-round match. Jun, who plays at UCLA, will battle Sara Brown, a 2 & 1 winner over Christi Athas, in round two.
'That helped me out a lot,' said Jun of the weather delay. 'It made me relax a little bit. I ate something. It got me re-energized.'
The opening round of match play was completed Thursday after the stroke-play portion was completed earlier in the day after weather halted play Wednesday night. There was also a 64-minute weather delay Thursday, but the round was easily completed.
Kimberly Kim picked up the easiest win Thursday as she rolled, 7 & 6, over Anya Sarai Alvarez. Tiffany Joh, Juli Wightman and Laura Cross each cruised to 6 & 5 wins in round one.
Karla Murra was the only player that needed extra holes in her first-round match. Murra outlasted Onnarin Sattayabanphot 1-up in 19 holes.
The second and third rounds of match play will be contested on Friday. The quarterfinals and semifinals are scheduled for Saturday, while the 36-hole final takes place Sunday.